Act 3 throws you into the midst of the large city of Baldur's Gate, full of intrigue, danger, and political tension. Your choices in this act will determine the fate of the city and its inhabitants, as there are multiple endings depending on your actions. To get the most out of this act, it is necessary to know both the main and side quests, as well as interactions with your companions.

Main Quest: Siege of Baldur's Gate

Arrival in Baldur's Gate

After you finally reach the city, you'll have to delve into the political situation, find out about the conflict between different factions, and understand who is the most dangerous for Baldur's Gate.

Reach the following crucial places in the city: the Palace of Upper City and Lower City; secure vital information and find out the state of affairs from within.

Infiltrating Upper City

You'll have to find a way into Upper City if you wish to access some parts of the city. That's where the elite stay, and one must win their confidence without raising eyebrows.

Alternatively, using your diplomacy or persuasion skills to get into the confidence of influential figures, or just searching for hidden paths leading to this discreet entry.

Confront the Children of Bhaal

Uncovering the mysteries of the cult of Bhaal and their activities in this city is an important plot point for Act 3.

You are required to research suspicious persons, expose ties of the cult, and interfere with their plans. That many times it means you have to choose between exposing and destroying information.

Battle for Baldur's Gate

Last but by no means least of the main thread quests is concluding the conflict threatened towards the city at the epic, literally namesake Battle for Baldur's Gate.

Prepare for a great battle, gathering an army or allies. Remember that your decisions throughout the quest will affect the outcome of this stage. Be prepared for betrayals and perilous choices that might alter the course of events of this battle.

Tips for Completing the Main Quest

Selection and planning of the allies-that is very important in Act 3. Not only does it help in a fight, but this will also provide ways to complete the task in hand.

Choosing diplomatic paths: Most often, you can avoid combat by using diplomacy. If you can influence political forces or turn them to your advantage, it might help you in avoiding bloodshed.

Decisiveness: Every step can turn out to be fateful. Act with prudence, as your decisions will change the plot and even the structure of the city.

By completing the main quests in Act 3, you will fight not only for Baldur's Gate but plunge into sophisticated political intrigues and difficult moral decisions determining the fate of your hero and citizens.

Side Quests and Activities in Act 3

There are many side quests in Act 3 that fortify bonds stronger between you and the city, your companions, and the story.

Notable Side Quests:

Mystical Nobility

Investigate a wealthy noble who seems to have ties to dark forces. This quest will test your moral resolve and may lead to unexpected alliances or enemies.

The Fate of the Githyanki

Continue with Lae'zel and try to help her get some things right with the leaders of the Githyanki. This will continue a lot about Lae'zel's background and her part in the conflict.

The Secret Library

Rumors have it that beneath Baldur's Gate lies a secret library of forbidden knowledge. Exploring this place will reveal new magical opportunities and possible new allies.

Ghosts of the Past Face Astaron's dark past. This quest will delve deeper into his character and may change the path your relationship with him takes.

Key Locations

Lower City

A no-go area with gangs, crimes, and underground activities. Most of the side quests and confrontations are taking place there; that's why it's very important when it comes to gathering information.

Upper City

The political heart of Baldur's Gate, this is a place of affluence and intrigue where the biggest political game plays are decided. You will also find some of the most challenging opponents here.

The Sewers

Beneath the city, it holds sewers that are filled with terrifying monsters and secrets. You may find side quests down here related to corruption in the city and its dark side.

Act 3 Companion Quests

In Act 3, your companions continue on their journeys, and this act offers deeper storylines with them, as well as more complex interactions. 

Shadowheart: Her quest, "Daughter of Darkness," will explain everything about her past and her connection with the deity Shar. The right choices can significantly alter her story. 

Gale: In "The Wizard of Waterdeep," Gale faces a magical disaster, and your decisions will go a long way toward determining his future-for the wrong actions might lead to his catastrophe. 

Wyll: The quest "Blade of the Frontier" reveals a contract between Wyll and his patron, which is crucial to his storyline and can be altered with the wrong choices. Important Tips for 

Act 3: Explore everything-this city is full of secrets. Search out all the hidden quests, items, and character encounters that could aid or hamper your quest for success. Pay attention to relationships your choices in Act 3 will strongly impact your relationships with companions and the outcomes of their personal quests. Watch out for timing: Some of the quests in Act 3 have a time frame, so pay attention to in-game tips so that you don't miss important things. Use your allies. The allies found in Act 3 can either prove helpful in combat or even while dealing with matters of politics, so choose good partners among these factions.

Conclusion

Act 3 of Baldur's Gate 3 is not only complex but action-packed, really, where the stakes are higher. What you do with your relationships, actions, and decisions colors the story unfolding and what possible endings occur. Don't forget to explore every nook and cranny, help your companions whenever you can, and be prepared for emerging dangers.